Critical Mass Collective namesake comes from the remarkable strain known for its huge yields, great power and vigorous growth which was firmly cemented in history by Howard Marks, Aka Mr. Nice, and legendary breeders Nevil & Shantibaba. Critical Mass Collective develops the very best reworked variations of Critical Mass the world has ever seen by using the revered Monster Mass strain within their breeding programs. The full range of feminised and auto flowering cannabis seeds are available to buy at the Attitude Seedbank.